On this topic, the idea I once had, in trying to develop a semi-plausible, yet fairly socially liberal, fascist movement for a story I once thought of, my idea for allowing a form of "gay rights", if you will, was genetics to become better known, earlier. That is, develop the theory that there is a genetic component to sexuality earlier, getting rid of the idea of "choice", on some level, earlier.
The fascist movement I developed for such a universe (which was in the United States, so take it with a grain of salt; I'd say it's damn near ASB if not across the line) develops the eugenicist idea that homosexuality is, clearly, not a trait that society wants passed on. But many homosexuals have skills and capabilities which can be used to serve the state. Therefore, the state could recognize homosexuality on some level, actively encouraging people with homosexual tendencies to make such public and directly remove themselves from the gene pool for nationalist reasons, yet still be fairly "gay friendly" in the sense that such people are perfectly capable of entering into recognized relationships, taking part in Party politics and serving the state like anyone else; the only thing they sacrificed was the possibility of genetic offspring.
Of course, this idea requires both the early development of genetic theory AND a relatively liberal, forward-thinking form of fascism, which most people would say is ASB in and of itself.